linux-kernel - Re: [PATCH 04/11] pinctrl: mvebu: add pinctrl driver for Armada 370

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Message-ID: <20120820193622.4e539451@skate>
Date:	Mon, 20 Aug 2012 19:36:22 +0200
From:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>,
	Russell King <linux@....linux.org.uk>,
	Lior Amsalem <alior@...vell.com>, Andrew Lunn <andrew@...n.ch>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	Ben Dooks <ben.dooks@...ethink.co.uk>,
	devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Stephen Warren <swarren@...dotorg.org>
Subject: Re: [PATCH 04/11] pinctrl: mvebu: add pinctrl driver for Armada 370

Le Mon, 20 Aug 2012 18:48:32 +0200,
Sebastian Hesselbarth <sebastian.hesselbarth@...il.com> a écrit :

> this is really difficult here ;) I thought I could just add PINCTRL_DOVE
> to MACH_DOVE inside ARCH_MVEBU, PINCTRL_KIRKWOOD to MACH_KIRKWOOD, aso.
> But there is a common MACH_ARMADA_370_XP for both 370 and XP obviously.
> 
> If it is ok for you I will add both PINCTRL_ stubs to the Kconfig and
> you work it out if you ever have two distinct MACHs? Or it could remain
> selectable in pinctrl/Kconfig but that will then be different with the
> other stubs.

In order to keep the consistency with other SoC families, maybe we can
split the 370 and XP options in two separate MACH_ARMADA_370 and
MACH_ARMADA_XP. So, in the ideal world, once all Marvell EBU SoCs are
converted to DT+mach-mvebu, we should have:

 *) arch/arm/Kconfig defines MACH_MVEBU

 *) arch/arm/mach-mvebu/Kconfig defines MACH_KIRKWOOD, MACH_DOVE,
    MACH_MX78X00, MACH_ARMADA_370, MACH_ARMADA_XP, MACH_ORION5X

Then, an user is free to build a single kernel image that supports all,
or a selection of the supported Marvell EBU SoCs.

Would that be ok with you?

If that's fine with you, then I would prefer if we keep the single
MACH_ARMADA_370_XP symbol for now, so that your pinctrl set of patches
does not depend on something else. We would do the small Kconfig option
refactoring as a follow-up set of patches. Thoughts?

Best regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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